San Francisco, California - Air Quality
What do these numbers mean?
Lower is better. Homefacts looks at the measuring stations across the country and compares the amounts of each specific pollutant. A lower number means it has fewer amounts of that pollutant. For example: If your city has a 10 for Lead, it means that 90% of the stations around the country are measuring higher amounts than your local station.
Carbon Monoxide (1 measuring station(s))
EPA Standard:1 Hour Average: 35 | 8 Hour Average: 9 | Measurement Type: PPM (Parts Per Million)
Station:10 Arkansas St., San Francisco, CA
Station Rank: 171 out of 364
| No. of Oberservations | 6247 | 1 Hour 1st Max | 2.1 |
| 1 Hour 2nd Max | 1.9 | Exceeded 1 Hour Standard | 0 |
| 8 Hour 1st Max | 1.5 | 8 Hour 2nd Max | 1.4 |
| Exceeded 8 Hour Standard | 0 |
Lead (1 measuring station(s))
EPA Standard:Quaterly Mean: 1.5 | Measurement Type: ug/m3 (Micrograms Per Cubic Meter)
Station:1340 Sixth Street, Berkeley, CA
Station Rank: 38 out of 134
| No. of Oberservations | 30 | 24 Hour 1st Max | 0.02 |
| 24 Four Hour 2nd Max | 0.02 | 1st Qtr. Quarterly Average | 0.01 |
| 2nd Qtr. Quarterly Average | 0.01 | Exceeded Quarterly Average Standard | 0 |
Ozone (1 measuring station(s))
EPA Standard:1 Hour Average: 0.12 | 8 Hour Average: 0.075 | Measurement Type: PPM (Parts Per Million)
Station:10 Arkansas St., San Francisco, CA
Station Rank: 10 out of 1194
| 1 Hour 1st Max | 0.082 | 1 Hour 2nd Max | 0.073 |
| 1 Hour 3rd Max | 0.066 | 1 Hour 4th Max | 0.065 |
| Exceeded 1 Hour Standard | 0 | Days Observed 1 Hour Levels | 271 |
| 8 Hour 1st Max | 0.066 | 8 Hour 2nd Max | 0.052 |
| 8 Hour 3rd Max | 0.05 | 8 Hour 4th Max | 0.049 |
| Exceeded 8 Hour Standard | 0 | Days Observed 8 Hour Levels | 266 |
PM 10 (1 measuring station(s))
EPA Standard:24 Hour Average: 150 | Annual Mean 50 | Measurement Type: ug/m3 (Micrograms Per Cubic Meter
Station:10 Arkansas St., San Francisco, CA
Station Rank: 378 out of 870
| No. of Oberservations | 46 | 24 Hour 1st Max | 41 |
| 24 Four Hour 2nd Max | 38 | 24 Four Hour 3rd Max | 38 |
| 24 Four Hour 4th Max | 38 | Exceeded 24 Hour Standard | 0 |
| Annual Mean | 21 | Exceeded Annual Mean Standard | 0 |
PM 2.5 (1 measuring station(s))
EPA Standard:24 Hour Average: 35 | Annual Mean 15 | Measurement Type: ug/m3 (Micrograms Per Cubic Meter
Station:10 Arkansas St., San Francisco, CA
Station Rank: 243 out of 940
| No. of Oberservations | 71 | 24 Hour 1st Max | 29.4 |
| 24 Four Hour 2nd Max | 26.8 | 24 Four Hour 3rd Max | 20.4 |
| 24 Four Hour 4th Max | 19.4 | Exceeded 24 Hour Standard | 0 |
| Annual Mean | 9.1 | Exceeded Annual Mean Standard | 0 |
Sulfur Dioxide (1 measuring station(s))
EPA Standard:3 Hour Max: 0.05 | 24 Hour Max: 0.14 | Annual Mean: 0.03 | Measurement Type: PPM (Parts Per Million)
Station:10 Arkansas St., San Francisco, CA
Station Rank: 70 out of 478
| No. of Oberservations | 5890 | 1 Hour 1st Max | 0.021 |
| 1 Hour 2nd Max | 0.015 | 3 Hour 1st Max | 0.012 |
| 3 Hour 2nd Max | 0.009 | Exceeded 3 Hour Standard | 0 |
| 24 Hour 1st Max | 0.004 | 24 Four Hour 2nd Max | 0.004 |
| Exceeded 24 Hour Standard | 0 | Annual Mean | 0.001 |
| Exceeded Annual Mean Standard | 0 |
Featured Articles
More Article Topics:
